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EMBRYONIC DEVELOPMENT & STEM CELL COMPENDIUM
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LifeMap Discovery

Watch the introductory video to learn more about our database of embryonic development for stem cell research and regenerative medicine

All in Vivo Cells > Cell Card
Bone
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Rostral Skull Membranous Bones
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Intramembranous Preosteoblasts (RSMBs)


Bn.RSMBs.InPCs
Intramembranous preosteoblasts are cells in the inner layer of the periosteum that develop into osteoblasts. Theses cells which will develop to become osteoblasts, will secrete the osteoid, an organic non-mineralized portion of the bone matrix which is formed before the actual maturation of the bone occurs.

Only 10-20% of vertebrate bones follow Intramembranous ossification fate. Bones of the cranial vault (calvarium; flat bones) form through the process of intramembranous ossification.
Prenatal
Intramembranous Preosteoblasts
Multiple Ancestors Single Ancestor No Descendants Develops from Part of Parent